/*
 * chombo: on spark
 * Author: Pranab Ghosh
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you
 * may not use this file except in compliance with the License. You may
 * obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0 
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */


package org.chombo.spark.common

import org.apache.spark.Partitioner

/**
 * Partitioner for secondary sorting. The last element of record is secondary key
 * @author pranab
 *
 */
class RecordPartitioner(partitions: Int) extends Partitioner {
    override def numPartitions: Int = partitions

    
    /**
     * @param key
     * @return
     */
    override def getPartition(key: Any): Int = {
      val recKey = key.asInstanceOf[Record]
      recKey.prefixHashCode(1) % numPartitions
    }    
}